/*************************************************************************
Crytek Source File.
Copyright (C), Crytek Studios, 2001-2004.
-------------------------------------------------------------------------
$Id$
$DateTime$

-------------------------------------------------------------------------
History:
- 18:10:2005   14:14 : Created by Marcio Martins

*************************************************************************/
#include "StdAfx.h"
#include "Game.h"
#include "Bullet.h"
#include "GameRules.h"
#include <IEntitySystem.h>
#include <IGameTokens.h>
#include "AmmoParams.h"
#include <IVehicleSystem.h>


int CBullet::m_waterMaterialId = -1;
IEntityClass* CBullet::EntityClass = 0;

//------------------------------------------------------------------------
CBullet::CBullet()
{
}

//------------------------------------------------------------------------
CBullet::~CBullet()
{
}

//------------------------------------------------------------------------
void CBullet::HandleEvent(const SGameObjectEvent &event)
{
	FUNCTION_PROFILER(GetISystem(), PROFILE_GAME);

	CProjectile::HandleEvent(event);

	if (event.event == eGFE_OnCollision)
	{
		if (m_destroying)
			return;

		EventPhysCollision *pCollision = reinterpret_cast<EventPhysCollision *>(event.ptr);
		if (!pCollision)
			return;
        
		IEntity *pTarget = pCollision->iForeignData[1]==PHYS_FOREIGN_ID_ENTITY ? (IEntity*)pCollision->pForeignData[1]:0;

		//Only process hits that have a target
		if(pTarget)
		{
			Vec3 dir(0, 0, 0);
			if (pCollision->vloc[0].GetLengthSquared() > 1e-6f)
				dir = pCollision->vloc[0].GetNormalized();

			CGameRules *pGameRules = g_pGame->GetGameRules();

			IActor* pActor = g_pGame->GetIGameFramework()->GetIActorSystem()->GetActor(m_ownerId);

			bool ok = true;

			if(!gEnv->bMultiplayer && pActor && pActor->IsPlayer())
			{
				IActor* pAITarget = g_pGame->GetIGameFramework()->GetIActorSystem()->GetActor(pTarget->GetId());
				if(pAITarget && pTarget->GetAI() && pTarget->GetAI()->IsFriendly(pActor->GetEntity()->GetAI(), false))
				{
					pGameRules->SetEntityToIgnore(pTarget->GetId());
					ok = false;
				}
			}

			if(ok)
			{
				HitInfo hitInfo(m_ownerId, pTarget->GetId(), m_weaponId,
					(float)m_damage, 0.0f, pGameRules->GetHitMaterialIdFromSurfaceId(pCollision->idmat[1]), pCollision->partid[1],
					m_hitTypeId, pCollision->pt, dir, pCollision->n);

				hitInfo.remote = IsRemote();
				hitInfo.projectileId = GetEntityId();
				hitInfo.bulletType = m_pAmmoParams->bulletType;

				pGameRules->ClientHit(hitInfo);

				// Notify AI
				if (gEnv->pAISystem && !gEnv->bMultiplayer)
				{
					static int htMelee = pGameRules->GetHitTypeId("melee");
					if (m_ownerId && m_hitTypeId != htMelee)
					{
						ISurfaceType *pSurfaceType = pGameRules->GetHitMaterial(hitInfo.material);
						const ISurfaceType::SSurfaceTypeAIParams* pParams = pSurfaceType ? pSurfaceType->GetAIParams() : 0;
						const float radius = pParams ? pParams->fImpactRadius : 2.5f;
						const float soundRadius = pParams ? pParams->fImpactSoundRadius : 20.0f;
						
						// Associate event with vehicle if the shooter is in a vehicle (tank cannon shot, etc)
						EntityId ownerId = m_ownerId;
						if (pActor && pActor->GetLinkedVehicle() && pActor->GetLinkedVehicle()->GetEntityId())
							ownerId = pActor->GetLinkedVehicle()->GetEntityId();

						SAIStimulus stim(AISTIM_BULLET_HIT, 0, ownerId, 0, pCollision->pt, ZERO, radius);
						gEnv->pAISystem->RegisterStimulus(stim);

						SAIStimulus stimSound(AISTIM_SOUND, AISOUND_COLLISION_LOUD, ownerId, 0, pCollision->pt, ZERO, soundRadius, AISTIMPROC_FILTER_LINK_WITH_PREVIOUS);
						gEnv->pAISystem->RegisterStimulus(stimSound);

					}
				}

			}
		}
		else
		{
			// Notify AI
			// The above case only catches entity vs. entity hits, the AI is interested in all hits.
			if (gEnv->pAISystem && !gEnv->bMultiplayer)
			{
				CGameRules *pGameRules = g_pGame->GetGameRules();
				static int htMelee = pGameRules->GetHitTypeId("melee");
				if (m_ownerId && m_hitTypeId != htMelee)
				{
					int material = pGameRules->GetHitMaterialIdFromSurfaceId(pCollision->idmat[1]);
					ISurfaceType *pSurfaceType = pGameRules->GetHitMaterial(material);
					const ISurfaceType::SSurfaceTypeAIParams* pParams = pSurfaceType ? pSurfaceType->GetAIParams() : 0;
					const float radius = pParams ? pParams->fImpactRadius : 2.5f;
					const float soundRadius = pParams ? pParams->fImpactSoundRadius : 20.0f;

					// Associate event with vehicle if the shooter is in a vehicle (tank cannon shot, etc)
					EntityId ownerId = m_ownerId;
					IActor* pActor = g_pGame->GetIGameFramework()->GetIActorSystem()->GetActor(m_ownerId);
					if (pActor && pActor->GetLinkedVehicle() && pActor->GetLinkedVehicle()->GetEntityId())
						ownerId = pActor->GetLinkedVehicle()->GetEntityId();

					SAIStimulus stim(AISTIM_BULLET_HIT, 0, ownerId, 0, pCollision->pt, ZERO, radius);
					gEnv->pAISystem->RegisterStimulus(stim);

					SAIStimulus stimSound(AISTIM_SOUND, AISOUND_COLLISION_LOUD, ownerId, 0, pCollision->pt, ZERO, soundRadius, AISTIMPROC_FILTER_LINK_WITH_PREVIOUS);
					gEnv->pAISystem->RegisterStimulus(stimSound);

				}
			}
		}


		if (pCollision->pEntity[0]->GetType() == PE_PARTICLE)
		{
			float bouncy, friction;
			uint32	pierceabilityMat;
			gEnv->pPhysicalWorld->GetSurfaceParameters(pCollision->idmat[1], bouncy, friction, pierceabilityMat);
			pierceabilityMat&=sf_pierceable_mask;
			
			pe_params_particle params;
			if(pCollision->pEntity[0]->GetParams(&params)==0)
				SetDefaultParticleParams(&params);

			//Under water trail
			Vec3 pos=pCollision->pt;
			if ((pCollision->idmat[1] == CBullet::m_waterMaterialId) && 
					(pCollision->pEntity[1]!=gEnv->pPhysicalWorld->AddGlobalArea() || !gEnv->p3DEngine->GetVisAreaFromPos(pos)))
			{
				//Reduce drastically bullet velocity (to be able to see the trail effect)
				//pe_params_particle pparams;
				//if(m_pPhysicalEntity->GetParams(&pparams)==0)
					//SetDefaultParticleParams(&pparams);
				//pparams.velocity = 25.0f;

				//m_pPhysicalEntity->SetParams(&pparams);

				if(m_trailUnderWaterId<0)
				{
					//Check terrain/against water level
					float terrainHeight = gEnv->p3DEngine->GetTerrainElevation(pCollision->pt.x,pCollision->pt.y);
					float waterLevel = gEnv->p3DEngine->GetWaterLevel(&(pCollision->pt));
					if(waterLevel>terrainHeight)
					{
						TrailEffect(true,true);
						return;
					}
				}
			}

			if (pierceabilityMat<=params.iPierceability || pCollision->idCollider==-1) //Do not destroy if collides water
				Destroy();
		}
	}
}

void CBullet::SetWaterMaterialId()
{
	m_waterMaterialId = gEnv->p3DEngine->GetMaterialManager()->GetSurfaceTypeManager()->GetSurfaceTypeByName("mat_water")->GetId();
}


